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Difference in Torque Tubes...

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Old Jan 22, 2007 | 10:29 AM
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Default Difference in Torque Tubes...

What is the difference between a '99 torque tube and an '02?
Was the '02 Z06 the same as an '02 coupes torque tube?
Can you replace a '99's torque tube with one from an '02?
Any help is apprciated.
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Old Jan 22, 2007 | 10:31 AM
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All 01+ Manual Torque tubes are bigger in diameter than the '00 and before Manual torque tubes.
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Old Jan 22, 2007 | 11:06 AM
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Aren't 01+ A4 torque tubes larger in diameter and stronger?

Keith
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Old Jan 22, 2007 | 11:08 AM
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Originally Posted by kromberg
Aren't 01+ A4 torque tubes larger in diameter and stronger?

Keith
No idea on the A4s

Also yes you can bolt an 01+ tq tube for a 6 speed in a '00 or prior 6 speed. I did the swap in my '00 FRC.
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Old Jan 22, 2007 | 11:27 AM
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I just realized I didn't specify trans type. I was interested in 6speed. Will an auto torque tube work in a 6speed?
Thanks again for the replys.
93Polo why did you swap? Strength, upgraded parts? Something else?
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Old Jan 22, 2007 | 11:36 AM
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Originally Posted by geerookie
I just realized I didn't specify trans type. I was interested in 6speed. Will an auto torque tube work in a 6speed?
Thanks again for the replys.
93Polo why did you swap? Strength, upgraded parts? Something else?
An A4 tq tube will not work on a 6 speed.

The factory couplers on the original tq tube were destroyed much like the pics posted on here before and a rebuild kit was not available. After H&C I wanted something stronger so I went with the new tq tube and added the LG carbon fiber drive shaft.

Is your tq tube bad, how many miles do you have on your car? The early tq likes to fail at ~80k. We just rebuilt a '00 tq tube for a friend, new couplers and a bearing.

Last edited by 93Polo; Jan 22, 2007 at 11:39 AM.
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Old Jan 22, 2007 | 12:01 PM
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I'm @ about 81k. No vibrations but I have a whine when the car is in gear regardless of wether the clutch is in or out. It starts at about 1500 rpm and gets louder/higher pitched as the rpm's climb. If I'm cruising in 4th at 2k rpm and push in the clutch and put it in 3rd without releasing the clutch the whine gets higher and seems louder.
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Old Feb 13, 2021 | 09:03 AM
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Default Noise when in gear

Originally Posted by geerookie
I'm @ about 81k. No vibrations but I have a whine when the car is in gear regardless of wether the clutch is in or out. It starts at about 1500 rpm and gets louder/higher pitched as the rpm's climb. If I'm cruising in 4th at 2k rpm and push in the clutch and put it in 3rd without releasing the clutch the whine gets higher and seems louder.
So I think I have this exact same problem in my 2003 coupe. Do you remember what the fix was? I narrowed it down to the transmission since the noise goes away in neutral. Any ideas?
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Old Feb 13, 2021 | 09:50 AM
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Originally Posted by bnich11
So I think I have this exact same problem in my 2003 coupe. Do you remember what the fix was? I narrowed it down to the transmission since the noise goes away in neutral. Any ideas?
2007 theard He's still on forums so he should answer.
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Old Feb 17, 2021 | 03:15 PM
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Originally Posted by 93Polo
All 01+ Manual Torque tubes are bigger in diameter than the '00 and before Manual torque tubes.
the part also switched to a stronger aluminum . An obscure fact because it doesn't effect fitment, so is hardly mentioned , It has no effect on any buying decision between the parts, you get what they make, unlike some other parts where there might be some selection for a better construction.
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Old Feb 17, 2021 | 07:07 PM
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Correct, here are the technical details of the change in 2001 to support the Z06 which was rated at 385HP
• Torque Tube changed from metal-matrix composite to aluminum alloy 6061, increased in diameter from 55 to 63 mm.
• Driveshaft couplings have also been upgraded on manual-equipped models for additional strength and durability (prior to 2001 the coupling used 10mm bolts and 2001 the couplings use 12mm bolts).
The driveshaft is held in place by bearings inside the torque tube. In 2001, a stronger driveshaft was put into all C5s to cope with the higher performance of the Z06. The driveshaft was changed from a metal matrix composite to aluminum alloy 6061, and was increased in diameter from 55 mm to 63 mm. Driveshaft couplings also were upgraded on manual-equipped models for additional strength and durability.
Visual difference between the 10mm coupling TQ Tube Vs the 12mm coupling TQ Tube.
Note the 12mm coupling TQ Tube assembly is a direct replacement for the 10mm coupling TQ Tube and bolts right up with no issues as I have done this upgrade on a few 1999 C5's myself.
In the OP's case, if it was me and my money, I would get a 12mm coupling TQ Tube assembly off of "fleabay" and rebuild it and install it...

Side Note> the TQ for the Auto Trans will not work for a Manual Trans car due to a completely different configuration of the shaft and TQ Tube structure.


Cheers,
Goose
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Old Oct 13, 2021 | 05:34 PM
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Originally Posted by 93Polo
No idea on the A4s

Also yes you can bolt an 01+ tq tube for a 6 speed in a '00 or prior 6 speed. I did the swap in my '00 FRC.
did you have to do any modifications to get it to fit I’m going to be buying one from a guy I know. I had a shop pretty much destroy two of them so far so I’m doing it myself this time
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Old Oct 17, 2021 | 12:03 AM
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Originally Posted by 00Carbonc5
did you have to do any modifications to get it to fit I’m going to be buying one from a guy I know. I had a shop pretty much destroy two of them so far so I’m doing it myself this time
Bolt in
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Old Apr 25, 2026 | 01:48 AM
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Originally Posted by 69
Correct, here are the technical details of the change in 2001 to support the Z06 which was rated at 385HP
• Torque Tube changed from metal-matrix composite to aluminum alloy 6061, increased in diameter from 55 to 63 mm.
• Driveshaft couplings have also been upgraded on manual-equipped models for additional strength and durability (prior to 2001 the coupling used 10mm bolts and 2001 the couplings use 12mm bolts).
The driveshaft is held in place by bearings inside the torque tube. In 2001, a stronger driveshaft was put into all C5s to cope with the higher performance of the Z06. The driveshaft was changed from a metal matrix composite to aluminum alloy 6061, and was increased in diameter from 55 mm to 63 mm. Driveshaft couplings also were upgraded on manual-equipped models for additional strength and durability.
Visual difference between the 10mm coupling TQ Tube Vs the 12mm coupling TQ Tube.
Note the 12mm coupling TQ Tube assembly is a direct replacement for the 10mm coupling TQ Tube and bolts right up with no issues as I have done this upgrade on a few 1999 C5's myself.
In the OP's case, if it was me and my money, I would get a 12mm coupling TQ Tube assembly off of "fleabay" and rebuild it and install it...

Side Note> the TQ for the Auto Trans will not work for a Manual Trans car due to a completely different configuration of the shaft and TQ Tube structure.


Cheers,
Goose
Got a Question.

I have a 99 C5, and a 97-00 DSS Carbon Fiber Driveshaft.

I need to change my TQ Tube housing because my mechanic cracked it where the 11 bolts are.

He’s telling me to upgrade to the 01-04 housing (Snap ring version).

will my 97-00 DSS Shaft work in a 01-04 Housing?


Thanks!
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Old Apr 25, 2026 | 09:29 AM
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Originally Posted by BoostedLS99
Got a Question.

I have a 99 C5, and a 97-00 DSS Carbon Fiber Driveshaft.

I need to change my TQ Tube housing because my mechanic cracked it where the 11 bolts are.

He’s telling me to upgrade to the 01-04 housing (Snap ring version).

will my 97-00 DSS Shaft work in a 01-04 Housing?


Thanks!
he s mental plan and simple. i have stock and i m over 1000 hp
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Old Apr 25, 2026 | 02:24 PM
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Originally Posted by helga203
he s mental plan and simple. i have stock and i m over 1000 hp
I’m not sure if that answer my question.

I also don’t understand what you’re saying.

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Old Apr 25, 2026 | 05:58 PM
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Originally Posted by BoostedLS99
I’m not sure if that answer my question.

I also don’t understand what you’re saying.
i'm saying theres nothing to upgrade. he broke it, your car didn't so he doesnt know whats he talking about. there's nothing wrong with the 99 so upgrade if you want to but its not an upgrade. But if your asking if the snap ring 01-04 will work you have to call DSS
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Old Apr 28, 2026 | 03:35 PM
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Originally Posted by helga203
i'm saying theres nothing to upgrade. he broke it, your car didn't so he doesnt know whats he talking about. there's nothing wrong with the 99 so upgrade if you want to but its not an upgrade. But if your asking if the snap ring 01-04 will work you have to call DSS
Is it normal for my coupler eliminating DSS Carbon shaft to be 0.375 inches longer than the factory shaft guibo to guibo?

thanks
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